Refrigerator and defrosting control method

Abstract

The application provides a refrigerator and defrosting control method, and belongs to the technical field of household appliances. The refrigerator comprises a switching element. When the switching element is in a first state, refrigerant flows through a compressor, a condenser, a capillary tube, an ice-making evaporator and a freezing evaporator in sequence. When the switching element is in a second state, the refrigerant flows through the compressor, the condenser, the capillary tube and the freezing evaporator in sequence. The method comprises the following steps: when the freezing evaporator meets defrosting conditions and the ice-making evaporator does not meet defrosting conditions, the switching element is controlled to be in a third state, so that no refrigerant flows through the ice-making evaporator and the freezing evaporator, and a first defrosting device is controlled to defrost the freezing evaporator, and a second defrosting device is not controlled to defrost the ice-making evaporator. In the process, when it is detected that the ice-making chamber needs cold energy, an ice-making fan is controlled to operate, so that the remaining cold energy of the ice-making evaporator is blown to the ice-making chamber, and cold energy is provided for the ice-making chamber. In this way, precise control of defrosting can be realized.

Description

Technical Field

[0001] This application relates to the field of home appliance technology. More specifically, it relates to a refrigerator and a defrosting control method. Background Technology

[0002] Refrigerators typically have an ice-making compartment where liquid water can be frozen into ice cubes. The refrigerator has a separate ice-making evaporator to provide cooling to the ice-making compartment.

[0003] Currently, when controlling defrosting the ice-making evaporator, the standard is usually whether the freezing evaporator in the refrigerator needs defrosting. When the freezing evaporator meets the defrosting conditions, the control initiates defrosting for both the ice-making and freezing evaporators. When the freezing evaporator has finished defrosting, the control stops defrosting for both the ice-making and freezing evaporators.

[0004] However, the above defrosting method may result in a situation where the freezing evaporator meets the defrosting conditions but the ice-making evaporator does not. The accuracy of controlling the defrosting of the ice-making evaporator is relatively low, which affects the ice-making performance of the refrigerator. Summary of the Invention

[0005] This application provides a refrigerator and a defrosting control method, which can achieve precise and independent control of the defrosting of the ice-making evaporator and improve the ice-making performance of the refrigerator.

[0006] In a first aspect, embodiments of this application provide a refrigerator, comprising:

[0007] The cabinet is constructed with a freezer compartment and an ice-making compartment;

[0008] A refrigeration system is installed inside the enclosure, and the refrigeration system includes:

[0009] compressor;

[0010] Condenser;

[0011] Capillary;

[0012] The compressor, the condenser, and the capillary tube are connected in sequence.

[0013] An ice-making evaporator is used to provide cooling to the ice-making chamber;

[0014] An ice-making fan is used to blow the cold air from the ice-making evaporator into the ice-making chamber;

[0015] A refrigeration evaporator is used to provide cooling to the freezer compartment;

[0016] A first defrosting device is used to defrost the freeze evaporator;

[0017] A second defrosting device is used to defrost the ice-making evaporator;

[0018] A switching element connects a capillary tube, an ice-making evaporator, and a freezing evaporator. When the switching element is in a first state, the capillary tube and the ice-making evaporator are connected, allowing refrigerant to flow sequentially through the compressor, the condenser, the capillary tube, the ice-making evaporator, and the freezing evaporator. When the switching element is in a second state, the capillary tube and the freezing evaporator are connected, allowing refrigerant to flow sequentially through the compressor, the condenser, the capillary tube, and the freezing evaporator. When the switching element is in a third state, the capillary tube is not connected to either the ice-making evaporator or the freezing evaporator.

[0019] A controller, located within the enclosure, is configured to:

[0020] When the refrigeration evaporator meets the defrosting conditions but the ice-making evaporator does not meet the defrosting conditions, the switching element is controlled to be in the third state so that no refrigerant flows through either the ice-making evaporator or the refrigeration evaporator, and the first defrosting device is controlled to defrost the refrigeration evaporator while the second defrosting device does not defrost the ice-making evaporator.

[0021] During the defrosting process of the first defrosting device for the freezer evaporator, when the ice-making chamber is detected to require cooling, the ice-making fan is controlled to operate to blow the residual cold from the ice-making evaporator to the ice-making chamber, thereby providing cooling to the ice-making chamber.

[0022] In this application, the defrosting control of the freezer evaporator and the ice-making evaporator is independent. When the freezer evaporator meets the defrosting conditions but the ice-making evaporator does not, the defrosting device is not controlled to defrost the ice-making evaporator, thus improving the accuracy of the defrosting control of the ice-making evaporator. Furthermore, when defrosting the freezer evaporator, since there is no refrigerant flowing through the freezer evaporator, there is also no refrigerant flowing through the ice-making evaporator. If cooling is needed in the ice-making chamber at this time, the ice-making fan is controlled to operate to blow the residual cold from the ice-making evaporator to the ice-making chamber, thus achieving a continuous supply of cooling in the ice-making chamber. This reduces the impact on the ice-making performance of the refrigerator when defrosting the freezer evaporator.

[0023] In some embodiments of this application, the controller is configured as follows:

[0024] When the freezer compartment requires cooling and the ice-making compartment does not require cooling, the switching element is in the second state, so that refrigerant flows through the freezer evaporator and no refrigerant flows through the ice-making evaporator;

[0025] When the defrosting conditions of the evaporator are met, the switching element is controlled to switch from the second state to the third state.

[0026] In this application, when only the freezer compartment requires cooling, the control switch element is in the second state, ensuring that the refrigeration circuit includes only the freezer evaporator, so that refrigerant flows through the freezer evaporator while no refrigerant flows through the ice-making evaporator. Since both conducting states of the switch element require passing through the freezer evaporator, when the freezer evaporator needs to defrost, the control switch element switches to the third state, so that no refrigerant flows through the freezer evaporator.

[0027] In some embodiments of this application, the controller is configured as follows:

[0028] When both the freezer compartment and the ice-making compartment require cooling, the switching element is in a first state, so that the refrigerant flows sequentially through the ice-making evaporator and the freezer evaporator;

[0029] When the defrosting conditions of the evaporator are met, the switching element is controlled to switch from the first state to the third state.

[0030] In this application, when both the freezer compartment and the ice-making compartment require cooling, the control switch element is in a first state, connecting the ice-making evaporator and the freezing evaporator in series in the refrigeration circuit, ensuring refrigerant flow through both. Since both conducting states of the switch element require passage through the freezing evaporator, when the freezing evaporator needs defrosting, the control switch element switches to a third state, preventing refrigerant flow through it. This allows control of the refrigerant flow through the evaporator by controlling the state of the switch element.

[0031] In some embodiments of this application, the controller is further configured to:

[0032] During the process of controlling the first defrosting device to defrost the refrigeration evaporator, the switching element is in the third state so that no refrigerant flows through either the ice-making evaporator or the refrigeration evaporator;

[0033] When the ice-making evaporator is detected to meet the defrosting conditions, the second defrosting device is controlled to defrost the ice-making evaporator.

[0034] In this application, when the ice-making evaporator meets the defrosting conditions, the second defrosting device is controlled to defrost the ice-making evaporator, which can realize independent control of the defrosting of the ice-making evaporator and further improve the accuracy of the defrosting control of the ice-making evaporator.

[0035] In some embodiments of this application, the controller is further configured to:

[0036] During the process of controlling the first defrosting device to defrost the refrigeration evaporator and the second defrosting device to defrost the ice-making evaporator, the switching element is in the third state so that no refrigerant flows through either the ice-making evaporator or the refrigeration evaporator;

[0037] When the defrosting of the refrigeration evaporator is detected to be complete, the switching element is controlled to switch from the third state to the second state, so that refrigerant flows through the refrigeration evaporator and no refrigerant flows through the ice-making evaporator. The first defrosting device is controlled to stop defrosting the refrigeration evaporator, while the second defrosting device continues to defrost the ice-making evaporator.

[0038] In this application, when both evaporators are in defrosting state at the same time, if the refrigeration evaporator completes defrosting first, the state of the switching element can be switched to make the refrigeration evaporator and the capillary tube connected, and refrigerant can flow through the refrigeration evaporator so that the refrigeration evaporator can provide cooling capacity to the freezer compartment, making the defrosting control more flexible.

[0039] In some embodiments of this application, the controller is further configured to:

[0040] During the process of controlling the first defrosting device to defrost the refrigeration evaporator and the second defrosting device to defrost the ice-making evaporator, the switching element is in the third state so that no refrigerant flows through either the ice-making evaporator or the refrigeration evaporator;

[0041] When it is detected that both the freezing evaporator and the ice-making evaporator have completed defrosting, the switching element is controlled to switch from the third state to the first state, so that refrigerant flows through both the freezing evaporator and the ice-making evaporator, and the first defrosting device is controlled to stop defrosting the freezing evaporator, and the second defrosting device is controlled to stop defrosting the ice-making evaporator.

[0042] In this application, the switching element is only switched when both the freezing evaporator and the ice-making evaporator have completed defrosting, allowing refrigerant to flow through both. This reduces the possibility of one evaporator not defrosting properly if the switching element is switched to the first state based on the completion of defrosting of one evaporator, thus improving the accuracy of defrosting control.

[0043] In some embodiments of this application, the housing is further configured with a cold storage compartment;

[0044] The refrigeration system also includes:

[0045] A compartmentalized evaporator, connected to the switching element, is used to provide cooling capacity to the refrigerator compartment;

[0046] When the switching element is in the fourth state, the capillary tube and the compartment evaporator are connected, so that the refrigerant flows sequentially through the compressor, the condenser, the capillary tube, the compartment evaporator, the ice-making evaporator, and the freezing evaporator.

[0047] The controller is also configured to:

[0048] When the refrigerator compartment, the freezer compartment, and the ice-making compartment all require cooling, the switching element is controlled to be in the fourth state so that the refrigerant flows sequentially through the compartment evaporator, the ice-making evaporator, and the freezer evaporator.

[0049] In this application, by switching the state of the switching element, the compartment evaporator, the ice-making evaporator, and the freezing evaporator are connected in series in the refrigeration circuit. The refrigerant flows sequentially through the compressor, the condenser, the capillary tube, the compartment evaporator, the ice-making evaporator, and the freezing evaporator. This allows the compartment evaporator to provide cooling for the refrigerator compartment, the ice-making evaporator to provide cooling for the ice-making compartment, and the freezing evaporator to provide cooling for the freezer compartment. This achieves flexible control of the refrigeration circuit.

[0050] In some embodiments of this application, the controller is further configured to:

[0051] When the ice-making evaporator is detected to meet the defrosting conditions, the switching element is controlled to switch from the fourth state to the second state, so that refrigerant flows through the freezing evaporator, and no refrigerant flows through the ice-making evaporator and the compartment evaporator, and the second defrosting device is controlled to defrost the ice-making evaporator.

[0052] In this application, when only the ice-making evaporator meets the defrosting conditions, the control switch element switches to the second state, so that when the ice-making evaporator is defrosted, refrigerant still flows through the refrigeration evaporator, making the defrosting control more flexible and reducing the impact on the refrigeration evaporator when defrosting the ice-making evaporator.

[0053] In some embodiments of this application, the controller is further configured to:

[0054] When the defrosting conditions of the evaporator are met, the switching element is controlled to switch from the fourth state to the third state so that no refrigerant flows through the compartment evaporator, the ice-making evaporator and the evaporator, and the first defrosting device is controlled to defrost the evaporator.

[0055] Alternatively, when it is detected that both the ice-making evaporator and the freezing evaporator meet the defrosting conditions, the switching element is controlled to switch from the fourth state to the third state, so that no refrigerant flows through the compartment evaporator, the ice-making evaporator, and the freezing evaporator, and the first defrosting device is controlled to defrost the freezing evaporator, and the second defrosting device is controlled to defrost the ice-making evaporator.

[0056] In this application, the switching element is controlled according to the actual situation to defrost the evaporator that meets the defrosting conditions.

[0057] Secondly, this application provides a defrosting control method applied to a refrigerator, the refrigerator comprising:

[0058] The cabinet is constructed with a freezer compartment and an ice-making compartment;

[0059] A refrigeration system is installed inside the enclosure, and the refrigeration system includes:

[0060] compressor;

[0061] Condenser;

[0062] Capillary;

[0063] The compressor, the condenser, and the capillary tube are connected in sequence.

[0064] An ice-making evaporator is used to provide cooling to the ice-making chamber;

[0065] An ice-making fan is used to blow the cold air from the ice-making evaporator into the ice-making chamber;

[0066] A refrigeration evaporator is used to provide cooling to the freezer compartment;

[0067] A first defrosting device is used to defrost the freeze evaporator;

[0068] A second defrosting device is used to defrost the ice-making evaporator;

[0069] A switching element connects a capillary tube, an ice-making evaporator, and a freezing evaporator. When the switching element is in a first state, the capillary tube and the ice-making evaporator are connected, allowing refrigerant to flow sequentially through the compressor, the condenser, the capillary tube, the ice-making evaporator, and the freezing evaporator. When the switching element is in a second state, the capillary tube and the freezing evaporator are connected, allowing refrigerant to flow sequentially through the compressor, the condenser, the capillary tube, and the freezing evaporator. When the switching element is in a third state, the capillary tube is not connected to either the ice-making evaporator or the freezing evaporator.

[0070] The controller is located inside the enclosure;

[0071] The method includes:

[0072] When the refrigeration evaporator meets the defrosting conditions but the ice-making evaporator does not, the controller controls the switching element to the third state so that no refrigerant flows through either the ice-making evaporator or the refrigeration evaporator, and controls the first defrosting device to defrost the refrigeration evaporator while the second defrosting device does not defrost the ice-making evaporator.

[0073] During the defrosting process of the first defrosting device for the freezer evaporator, when the ice-making chamber is detected to require cooling, the controller controls the ice-making fan to operate, so as to blow the residual cold of the ice-making evaporator to the ice-making chamber and provide cooling for the ice-making chamber.

[0074] Thirdly, this application provides a computer-readable storage medium storing computer-executable instructions, which, when executed by a computer, are used to implement the method described in the second aspect.

[0075] The computer-readable storage medium provided in this application embodiment can execute the technical solutions in the above method embodiments, and its beneficial effects are similar, so they will not be described again here.

[0076] Fourthly, this application provides a computer program product, including a computer program that, when executed by a computer, is used to implement the method described in the second aspect.

[0077] The computer program product provided in this application embodiment can execute the technical solutions in the above method embodiments, and its beneficial effects are similar, so they will not be described again here. Attached Figure Description

[0078] To more clearly illustrate the implementation methods in the embodiments of this application or related technologies, the accompanying drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings.

[0079] Figure 1 This is a schematic diagram of a refrigerator according to some embodiments;

[0080] Figure 2 This is a schematic diagram of the internal structure of a refrigerator according to some embodiments;

[0081] Figure 3 This is a schematic diagram of the connection structure of a refrigeration element inside a refrigerator according to some embodiments;

[0082] Figure 4 This is a schematic diagram of the refrigerant flow path when a switching element is in a first state according to some embodiments;

[0083] Figure 5 This is a schematic diagram of the refrigerant flow path when a switching element is in a second state according to some embodiments;

[0084] Figure 6 This is a schematic diagram of the circulation path for providing cooling capacity to an ice-making chamber in an ice-making evaporator according to some embodiments;

[0085] Figure 7 This is a schematic diagram of the internal structure of a refrigerator including a compartment evaporator and a refrigeration fan according to some embodiments;

[0086] Figure 8 This is a schematic diagram of the connection structure of a refrigerator internal refrigeration element including a compartment evaporator according to some embodiments;

[0087] Figure 9 This is a schematic diagram of the refrigerant flow path when a switching element is in a fourth state according to some embodiments;

[0088] Figure 10 This is a flowchart illustrating a defrosting control method according to some embodiments. Detailed Implementation

[0089] To make the objectives, implementation methods and advantages of this application clearer, the exemplary implementation methods of this application will be clearly and completely described below with reference to the accompanying drawings of the exemplary embodiments of this application. Obviously, the described exemplary embodiments are only some embodiments of this application, and not all embodiments.

[0090] It should be noted that the brief descriptions of terms in this application are only for the convenience of understanding the embodiments described below, and are not intended to limit the embodiments of this application. Unless otherwise stated, these terms should be understood in their ordinary and common meaning.

[0091] Furthermore, the terms “comprising” and “having”, and any variations thereof, are intended to cover but not exclusively include, for example, a product or device that includes a series of components is not necessarily limited to those that are explicitly listed, but may include other components that are not explicitly listed or that are inherent to such product or device.

[0092] Refrigerators typically contain an ice-making evaporator and a freezer evaporator. The ice-making evaporator provides cooling to the ice-making compartment, while the freezer evaporator provides cooling to the freezer compartment. During operation, frost forms on the surfaces of both the ice-making and freezer evaporators, necessitating defrosting.

[0093] Currently, defrosting of the ice-making evaporator and the freezing evaporator is controlled based on the condition of the freezing evaporator. Specifically: when the freezing evaporator meets the defrosting conditions, the control simultaneously defrosts both the ice-making evaporator and the freezing evaporator. During defrosting of both the ice-making evaporator and the freezing evaporator, no refrigerant flows through either one. When the freezing evaporator has finished defrosting, the control stops defrosting both the ice-making evaporator and the freezing evaporator.

[0094] However, the above-mentioned method of defrosting the ice evaporator does not take into account the actual situation of the ice evaporator. There may be a situation where the freezing evaporator meets the defrosting conditions but the ice evaporator does not. In this case, simultaneously controlling the defrosting of both the ice evaporator and the freezing evaporator may affect the temperature inside the ice chamber, thereby affecting the ice making of the refrigerator and resulting in a poor user experience.

[0095] Based on this, this application provides a refrigerator and a defrosting control method. A switching element controls whether refrigerant flows through the freezing evaporator and the ice-making evaporator. When the freezing evaporator meets the defrosting conditions, the state of the switching element is controlled to prevent refrigerant from flowing through either the ice-making evaporator or the freezing evaporator, thus controlling defrosting for the freezing evaporator. If the ice-making evaporator does not meet the defrosting conditions, defrosting can be stopped, making the defrosting control of the ice-making evaporator independent of that of the freezing evaporator, improving the accuracy of defrosting control. Furthermore, during the defrosting process of the freezing evaporator, if the ice-making compartment requires cooling, the ice-making fan can be controlled to operate, blowing the residual cold from the ice-making evaporator into the ice-making compartment to provide cooling, reducing the impact of defrosting the freezing evaporator on the temperature of the ice-making compartment, minimizing the impact on the refrigerator's ice-making performance, and improving the user experience.

[0096] The technical solutions of this application will be described in detail below with reference to specific embodiments. The following specific embodiments can be combined with each other or exist independently. The same or similar concepts or processes may not be described again in some embodiments. The embodiments of this application will be described below with reference to the accompanying drawings.

[0097] First, the structure of the refrigerator provided in some embodiments of this application will be described.

[0098] In one possible implementation, Figure 1 This is a schematic diagram of a refrigerator according to some embodiments, such as Figure 1 As shown, the refrigerator 10 includes a cabinet 101.

[0099] The refrigerator 10 also includes a door 102, which is connected to the cabinet 101.

[0100] The refrigerator 10 also includes a storage compartment, which is located inside the cabinet 101.

[0101] In one possible implementation, the storage room includes a freezer room, an ice-making room, etc.

[0102] The ice-making chamber can be located inside the storage room or on the door; this application embodiment does not limit this.

[0103] The refrigerator 10 also includes a controller. The controller is located inside the cabinet 101.

[0104] In the embodiments of this application, the controller can be a micro controller unit (MCU) or other types of controllers. The embodiments of this application do not specifically limit the controller.

[0105] In one possible implementation, a refrigeration system is installed inside the housing 101. Figure 2 This is a schematic diagram of the internal structure of a refrigerator according to some embodiments.

[0106] like Figure 2 As shown, the refrigeration system includes a refrigerator compartment 21, a freezer compartment 22, and an ice-making compartment 23 is provided on the refrigerator door 102. The refrigerator compartment is equipped with an ice-making evaporator 24 and an ice-making fan 25, while the freezer compartment is equipped with a freezing evaporator 26 and a freezing fan 27.

[0107] For example, the ice-making fan and the refrigeration fan can be a fan or other device that can blow cold air to the corresponding storage room. This application does not specifically limit the ice-making fan and the refrigeration fan. Figure 2 The example of ice maker fans and refrigeration fans being both fans is used for illustration and does not constitute any limitation.

[0108] The ice-making evaporator 24 provides cooling to the ice-making chamber 23, and the ice-making fan 25 blows the cooling from the ice-making evaporator 24 into the ice-making chamber 23. The freezing evaporator 26 provides cooling to the freezing chamber 22, and the freezing fan 27 blows the cooling from the freezing evaporator 26 into the freezing chamber 22.

[0109] Figure 3 This is a schematic diagram of the connection structure of a refrigeration element inside a refrigerator according to some embodiments.

[0110] like Figure 3 As shown, the refrigeration system also includes a compressor 31, a condenser 32, a capillary tube 33, and a switching element 34.

[0111] The switching element 34 is used to connect the capillary tube 33, the ice-making evaporator 24, and the freezing evaporator 26. By switching the switching element 34 to different states, the capillary tube 33 and the different evaporators can be connected.

[0112] For example, the switching element 34 can be a solenoid valve or a device capable of achieving different conduction states; this application embodiment does not limit this.

[0113] When the switching element 34 is in the first state, the capillary tube 33 and the ice-making evaporator 24 are connected, so that the refrigerant flows sequentially through the compressor 31, condenser 32, capillary tube 33, ice-making evaporator 24 and freezing evaporator 26. (See also...) Figure 4 As shown, Figure 4 This is a schematic diagram of the refrigerant flow path when a switching element is in a first state according to some embodiments.

[0114] When the switching element 34 is in the second state, the capillary tube 33 and the refrigeration evaporator 26 are connected, so that the refrigerant flows sequentially through the compressor 31, condenser 32, capillary tube 33 and refrigeration evaporator 26. (See also...) Figure 5 As shown, Figure 5 This is a schematic diagram of the refrigerant flow path when a switching element is in a second state according to some embodiments.

[0115] When the switching element 34 is in the third state, there is no connection between the capillary tube 33 and the ice-making evaporator 24 and the freezing evaporator 26.

[0116] In combination with the above Figure 2 and Figure 3 As shown, Figure 6 This is a schematic diagram of the circulation path for providing cooling to the ice-making chamber in an ice-making evaporator according to some embodiments.

[0117] based on Figure 6As shown, the working process of the relevant devices in the refrigerator during ice making includes: the compressor 31 compresses the low-temperature, low-pressure refrigerant gas into a high-temperature, high-pressure gas, which is then discharged to the condenser 32. The condenser 32 cools and condenses the high-temperature, high-pressure refrigerant gas into a high-pressure liquid. The high-pressure liquid refrigerant is throttled and depressurized through the capillary tube 33, becoming a low-temperature, low-pressure liquid. The low-temperature, low-pressure liquid refrigerant enters the ice-making evaporator 24 through the switching element 34. The ice-making fan 25 sends the cold energy from the ice-making evaporator 24 through the air duct inside the cabinet 101 to the ice-making chamber 23 on the door 102. Inside the ice-making chamber 23, the temperature of the liquid water is lowered through heat exchange to make ice, absorbing the cold energy. The return air generated after absorption returns to the bottom of the ice-making evaporator 24 through the return air duct inside the cabinet 101. The return air then passes through the ice-making evaporator 24 again, becoming a low-temperature, low-pressure gas. The low-temperature, low-pressure refrigerant gas is then drawn into the compressor 31 to start the next cycle. Through continuous circulation, the water in the ice-making chamber 23 is made into ice cubes.

[0118] The process by which the freezer evaporator 26 provides cooling capacity to the freezer compartment 22 is similar to the process by which the ice-making evaporator 24 provides cooling capacity to the ice-making compartment, and will not be described again in the embodiments of this application.

[0119] The housing 101 may also include a first defrosting device, which can be used to defrost the freeze evaporator 26.

[0120] For example, the defrosting device may include a defrosting heating wire, which is controlled to operate to heat the frost on the freezer evaporator 26, thereby defrosting the freezer evaporator 26.

[0121] During refrigerator operation, the evaporator 26 supplies cooling energy to the freezer compartment 22. After cooling is achieved in the freezer compartment 22, the cooling energy returns to the evaporator 26, causing frost to form on the evaporator 26. As the refrigerator operates, the frost on the evaporator 26 accumulates. Therefore, the controller needs to activate the first defrosting device to defrost the evaporator 26.

[0122] In this embodiment of the application, the process of the controller controlling the first defrosting device to defrost the evaporator 26 may include: when the evaporator 26 meets the defrosting conditions, the controller controls the switching element 34 to be in the third state so that no refrigerant flows through either the ice-making evaporator 24 or the evaporator 26, and controls the first defrosting device to defrost the evaporator 26.

[0123] Methods for determining whether the evaporator 26 meets the defrosting conditions may include determining whether defrosting is needed based on the cumulative running time of the compressor 31. When the running time of the compressor 31 reaches a preset value, the evaporator 26 is determined to meet the defrosting conditions. Alternatively, determining whether defrosting is needed based on the number of times the refrigerator door is opened and closed. When the number of door openings reaches a set value, the evaporator 26 is determined to meet the defrosting conditions. Alternatively, determining whether defrosting is needed by monitoring the difference between the evaporator surface temperature and the ambient temperature. When the difference reaches a set temperature value, the evaporator 26 is determined to meet the defrosting conditions. Alternatively, detecting the frost layer thickness on the evaporator surface using an optical sensor or an ultrasonic sensor, and determining that the evaporator 26 meets the defrosting conditions when the thickness reaches a set thickness value. Alternatively, determining that the evaporator 26 meets the defrosting conditions when a preset time interval (e.g., 12 hours) is reached. Other determination methods may also be included, which are not specifically limited in this embodiment.

[0124] In this way, when defrosting the freezer evaporator 26, defrosting of the ice-making evaporator 24, which does not meet the defrosting conditions, is not controlled. This makes the defrosting control of the ice-making evaporator 24 independent of the defrosting control of the freezer evaporator 26, which can improve the accuracy of defrosting the ice-making evaporator 24.

[0125] In the prior art, when there is no refrigerant flowing through the ice evaporator 24, the ice fan 25 is usually controlled to stop operating, but at this time the ice chamber 23 may still need cooling.

[0126] In this application, when the switching element 34 is in the third state, no refrigerant flows through the ice evaporator 24. It can detect whether the ice chamber 23 needs cooling. If the ice chamber 23 needs cooling, the ice fan 25 can be controlled to operate to blow the residual cold from the ice evaporator 24 to the ice chamber 23 to provide cooling for the ice chamber 23.

[0127] In this way, when cooling is needed in the ice-making chamber 23 and no refrigerant flows through the ice-making evaporator 24, the ice-making fan 25 can be controlled to operate to blow the residual cold from the ice-making evaporator 24 to the ice-making chamber 23, thus achieving a continuous supply of cooling in the ice-making chamber and reducing the impact on the ice-making performance of the refrigerator when defrosting the freezer evaporator 26.

[0128] In this application, when the evaporator 26 meets the defrosting conditions, the controller controls the switching element 34 to switch to the third state in the following two possible implementations:

[0129] One possible implementation is that when the freezer compartment requires cooling but the ice maker compartment does not, the switching element 34 is in the second state, allowing refrigerant to flow through the freezer evaporator 26 while no refrigerant flows through the ice maker evaporator 24. When the freezer evaporator 26 is detected to meet the defrosting conditions, the control switching element 34 switches from the second state to the third state.

[0130] Thus, when only the freezer compartment requires cooling, the control switch element 34 is in the second state, ensuring that the refrigeration circuit includes only the freezer evaporator 26, allowing refrigerant to flow through the freezer evaporator 26 while no refrigerant flows through the ice-making evaporator 24. Since both conducting states of the switch element 34 require passing through the freezer evaporator 26, when the freezer evaporator 26 needs defrosting, the control switch element 34 switches to the third state, ensuring no refrigerant flows through the freezer evaporator 26.

[0131] In another possible implementation, when both the freezer compartment and the ice-making compartment require cooling, the switching element 34 is in a first state, allowing refrigerant to flow sequentially through the ice-making evaporator 24 and the freezer evaporator 26. When the freezer evaporator 26 is detected to meet the defrosting conditions, the control switching element 34 switches from the first state to a third state.

[0132] Thus, when both the freezer and ice-making compartments require cooling, the control switch element 34 is in the first state, connecting the ice-making evaporator 24 and the freezing evaporator 26 in series in the refrigeration circuit, ensuring refrigerant flows through both. Since any conducting state of the switch element 34 requires passing through the freezing evaporator 26, when the freezing evaporator 26 needs defrosting, the control switch element 34 switches to the third state, preventing refrigerant from flowing through the freezing evaporator 26.

[0133] In this application, the housing 101 also includes a second defrosting device for defrosting the ice-making evaporator 24.

[0134] When the switching element 34 is in the third state, during the process of controlling the first defrosting device to defrost the evaporator 26, it can detect in real time whether the ice-making evaporator 24 meets the defrosting conditions. When it is detected that the ice-making evaporator 24 meets the defrosting conditions, it controls the second defrosting device to defrost the ice-making evaporator.

[0135] The method for determining whether the ice-making evaporator 24 meets the defrosting conditions can be found in the method for determining whether the freezing evaporator 26 meets the defrosting conditions described in the above embodiments, and will not be repeated here.

[0136] It should be noted that the defrosting conditions of the ice-making evaporator 24 and the defrosting conditions of the freezing evaporator 26 are independent of each other.

[0137] In this way, when the ice evaporator 24 meets the defrosting conditions, the second defrosting device is controlled to defrost the ice evaporator 24, which can realize independent control of the defrosting of the ice evaporator 24 and further improve the accuracy of the defrosting control of the ice evaporator 24.

[0138] In this application, during the process of controlling the first defrosting device to defrost the freezer evaporator 26 and the second defrosting device to defrost the ice-making evaporator, the following two possible situations may occur:

[0139] Scenario 1: During the process of controlling the first defrosting device to defrost the refrigeration evaporator 26 and the second defrosting device to defrost the ice-making evaporator, when it is detected that the defrosting of the refrigeration evaporator 26 is completed, the control switch element 34 switches from the third state to the second state, so that refrigerant flows through the refrigeration evaporator 26 and no refrigerant flows through the ice-making evaporator 24, and controls the first defrosting device to stop defrosting the refrigeration evaporator 26, while the second defrosting device continues to defrost the ice-making evaporator 24.

[0140] Methods for detecting defrosting completion may include: monitoring the temperature of the evaporator surface using a temperature sensor, and determining defrosting completion when the temperature reaches a set value; or determining defrosting completion after a preset defrosting time; or determining defrosting completion by detecting the current of the defrosting device, etc. This application does not specifically limit the method for detecting defrosting completion.

[0141] In this way, when both evaporators are in the defrosting state at the same time, if the refrigeration evaporator 26 completes defrosting first, the state of the switching element 34 can be switched to make the refrigeration evaporator 26 and the capillary tube 33 connected, and refrigerant flows through the refrigeration evaporator 26 so that the refrigeration evaporator 26 can provide cooling capacity to the freezer compartment, making the defrosting control more flexible.

[0142] Scenario 2: During the process of controlling the first defrosting device to defrost the refrigeration evaporator 26 and the second defrosting device to defrost the ice-making evaporator, the switching element 34 is in the third state so that no refrigerant flows through either the ice-making evaporator 24 or the refrigeration evaporator 26.

[0143] When it is detected that both the freezer evaporator 26 and the ice maker evaporator 24 have completed defrosting, the first defrosting device is controlled to stop defrosting the freezer evaporator 26, the second defrosting device is controlled to stop defrosting the ice maker evaporator 24, and the switching element 34 is controlled to switch from the third state to the first state so that refrigerant flows through both the freezer evaporator 26 and the ice maker evaporator 24.

[0144] The method for detecting the completion of defrosting can be found in the above embodiments and will not be repeated here.

[0145] Because the ice-making chamber requires a large amount of cooling, there may be more frost on the ice-making evaporator 24 than on the freezing evaporator 26. If the existing method of controlling defrosting based on the freezing evaporator 26 is used, the freezing evaporator 26 may defrost completely while the ice-making evaporator 24 is not, resulting in incomplete defrosting of the ice-making evaporator 24. Over time, this may lead to an accumulation of frost on the ice-making evaporator 24, affecting its performance and even its lifespan. Therefore, the accuracy of the above-mentioned method for controlling the defrosting of the ice-making evaporator 24 is relatively low.

[0146] In this way, the switching element 34 is only switched when both the freezer evaporator 26 and the ice-making evaporator 24 have completed defrosting, ensuring that refrigerant flows through both evaporators. This reduces the possibility of one evaporator not defrosting properly if the switching element 34 is switched to the first state based on the completion of defrosting of one evaporator, thus improving the accuracy of defrosting control.

[0147] Based on the above Figure 2 As shown, the refrigerator includes a refrigerator compartment 21, which is equipped with a compartment evaporator 28 and a refrigerator fan 29. The compartment evaporator 28 is connected to a switching element 34 to provide cooling capacity to the refrigerator compartment 21.

[0148] The compartment evaporator 28 is used to provide cooling capacity to the refrigerator compartment 21, and the refrigerator fan 29 is used to blow the cooling capacity of the compartment evaporator 28 into the refrigerator compartment 21.

[0149] The refrigeration fan 29 can be a fan or other device capable of blowing cold air into the corresponding storage compartment. This application embodiment does not specifically limit the refrigeration fan 29. The following... Figure 7 The explanation uses the refrigeration fan 229 as an example and does not constitute any limitation.

[0150] Figure 7 This is a schematic diagram of the internal structure of a refrigerator, including a compartment evaporator and a refrigeration fan, according to some embodiments.

[0151] Figure 8 This is a schematic diagram of the connection structure of a refrigerator internal refrigeration element including a compartment evaporator according to some embodiments.

[0152] like Figure 8 As shown, the compartment evaporator 28 is connected to the switching element 34. When the switching element 34 is in the fourth state, the capillary tube 33 and the compartment evaporator 28 are connected, so that the refrigerant flows sequentially through the compressor 31, condenser 32, capillary tube 33, compartment evaporator 28, ice-making evaporator 24, and freezing evaporator 26. (See also...) Figure 9 As shown, Figure 9This is a schematic diagram of the refrigerant flow path when a switching element is in a fourth state according to some embodiments.

[0153] like Figure 9 As shown, when the switching element 34 is in the fourth state, the compartment evaporator 28, the ice-making evaporator 24, and the freezing evaporator 26 are connected in series in the refrigeration circuit.

[0154] In this embodiment, when the refrigerator compartment, freezer compartment and ice-making compartment all require cooling, the control switch element 34 is in the fourth state so that the refrigerant flows sequentially through the compartment evaporator 28, the ice-making evaporator 24 and the freezing evaporator 26.

[0155] In this way, by switching the state of the switching element 34, the compartment evaporator 28, the ice-making evaporator 24, and the freezing evaporator 26 are connected in series in the refrigeration circuit. The refrigerant flows sequentially through the compressor 31, condenser 32, capillary tube 33, compartment evaporator 28, ice-making evaporator 24, and freezing evaporator 26. This allows the compartment evaporator 28 to provide cooling for the refrigerator compartment, the ice-making evaporator 24 to provide cooling for the ice-making compartment, and the freezing evaporator 26 to provide cooling for the freezer compartment. This achieves flexible control of the refrigeration circuit.

[0156] based on Figure 8 As shown, when the ice-making evaporator 24 is detected to meet the defrosting conditions, the control switch element 34 switches from the fourth state to the second state so that refrigerant flows through the freezing evaporator 26, while no refrigerant flows through the ice-making evaporator 24 and the compartment evaporator 28.

[0157] After the switching element 34 switches from the fourth state to the second state, the refrigeration circuit can be referred to Figure 5 As shown.

[0158] In this way, when only the ice-making evaporator 24 meets the defrosting conditions, the control switch element 34 switches to the second state, so that when the ice-making evaporator 24 is defrosted, the refrigeration evaporator 26 still has refrigerant flowing through it, making the defrosting control more flexible and reducing the impact on the refrigeration evaporator 26 when defrosting the ice-making evaporator 24.

[0159] In this application, based on Figure 8 As shown, when the defrosting conditions of the evaporator 26 are detected, the control switch element 34 switches from the fourth state to the third state so that no refrigerant flows through the compartment evaporator 28, the ice-making evaporator 24 and the evaporator 26, and controls the first defrosting device to defrost the evaporator 26.

[0160] When it is detected that both the ice-making evaporator 24 and the freezing evaporator 26 meet the defrosting conditions, the control switch element 34 switches from the fourth state to the third state so that no refrigerant flows through the compartment evaporator 28, the ice-making evaporator 24 and the freezing evaporator 26, and controls the first defrosting device to defrost the freezing evaporator 26, and controls the second defrosting device to defrost the ice-making evaporator.

[0161] In this way, the switching element 34 can be controlled according to the actual situation to defrost the evaporator that meets the defrosting conditions.

[0162] In this application, based on Figure 8 The connection structure shown can be used to control the refrigerator in several other possible ways, including the following:

[0163] In one possible implementation, during the process of controlling the first defrosting device to defrost the refrigeration evaporator 26 and controlling the second defrosting device to defrost the ice-making evaporator, if the refrigeration evaporator 26 completes defrosting first, the control switch element 34 switches from the third state to the second state and controls the first defrosting device to stop defrosting the refrigeration evaporator 26, so that refrigerant flows through the refrigeration evaporator 26 and no refrigerant flows through the ice-making evaporator 24.

[0164] In one possible implementation, during the process of controlling the first defrosting device to defrost the refrigeration evaporator 26 and controlling the second defrosting device to defrost the ice-making evaporator, when it is detected that both the refrigeration evaporator 26 and the ice-making evaporator 24 have completed defrosting, the control switch element 34 switches from the third state to the first state, and controls the first defrosting device to stop defrosting the refrigeration evaporator 26 and the second defrosting device to stop defrosting the ice-making evaporator 24, so that refrigerant flows through both the refrigeration evaporator 26 and the ice-making evaporator 24.

[0165] In one possible implementation, when the ice-making evaporator 24 has not reached the defrosting condition and the freezing evaporator 26 is defrosting, if the ice-making chamber is detected to require cooling, the ice-making fan 25 is controlled to operate to blow the residual cold from the ice-making evaporator 24 to the ice-making chamber to provide cooling for the ice-making chamber.

[0166] In one possible implementation, when the refrigerator compartment does not require cooling, but both the ice-making compartment 23 and the freezer compartment 22 require cooling, the switching element 34 can be controlled to be in the first state, and the capillary tube 33 and the ice-making evaporator 24 are connected, so that the refrigerant flows sequentially through the compressor 31, the condenser 32, the capillary tube 33, the ice-making evaporator 24 and the freezer evaporator 26.

[0167] Figure 10 This is a flowchart illustrating a defrosting control method according to some embodiments.

[0168] like Figure 10As shown, the defrosting control method may include the following steps:

[0169] S1001, Refrigerator is turned on.

[0170] S1002, Program Startup.

[0171] The program can be a control program for defrosting the evaporator of an ice maker, and of course, it also includes other control programs.

[0172] S1003. Determine if the cooling system is on.

[0173] When the cooling is turned on, step S1004 can be executed; when the cooling is not turned on, step S1015 can be executed.

[0174] S1004: The refrigerator compartment, freezer compartment, and ice maker compartment all require refrigeration, and the solenoid valve is in the fourth state.

[0175] When the solenoid valve is in the fourth state, the refrigeration circuit in the refrigerator is as follows: Figure 9 As shown, the refrigerant flows sequentially through the compressor, condenser, capillary tube, compartment evaporator, ice-making evaporator, and freezing evaporator.

[0176] The defrosting of the evaporator in the refrigerator includes any one of the following steps: S1005-S1007, S1008-S1010, S1011-S1012 and S1014, and S1011-S1013.

[0177] S1005, The ice evaporator was detected to meet the defrosting conditions.

[0178] S1006. Control the solenoid valve to switch to the second state and control the second defrosting device to defrost the ice-making evaporator.

[0179] S1007. When the defrosting of the ice evaporator is complete, control the solenoid valve to switch back to the fourth state.

[0180] S1008, The defrosting conditions of the freezer evaporator have been detected.

[0181] S1009: Control the solenoid valve to switch to the first state and control the first defrosting device to defrost the ice-making evaporator.

[0182] In conjunction with the above embodiments, when the ice evaporator does not meet the defrosting conditions and the ice chamber requires cooling, the ice fan can be controlled to blow the residual cold from the ice evaporator into the ice chamber to provide cooling for the ice chamber.

[0183] S1010 When the defrosting of the evaporator is complete, control the solenoid valve to switch back to the fourth state.

[0184] S1011. It was detected that both the freezer evaporator and the ice-making evaporator meet the defrosting conditions.

[0185] S1012. Control the solenoid valve to switch to the first state, and control the first defrosting device to defrost the freezer evaporator, and the second defrosting device to defrost the ice-making evaporator.

[0186] S1013. When both the freezer evaporator and the ice-making evaporator have finished defrosting, control the solenoid valve to switch back to the fourth state.

[0187] S1014. When the defrosting of the refrigeration evaporator is completed but the defrosting of the ice-making evaporator is not completed, the control solenoid valve switches to the second state.

[0188] S1015, Run other programs.

[0189] Other programs are those other than the control program that controls the defrosting of the evaporator.

[0190] In this way, by switching the state of the solenoid valve, independent control of defrosting can be achieved, improving the flexibility of defrosting control.

[0191] This application also provides a computer-readable storage medium, which may include various media capable of storing program code, such as a USB flash drive, a portable hard drive, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk. Specifically, the computer-readable storage medium stores computer-executable instructions, which are executed by a computer to implement the technical solutions shown in the above-described method embodiments.

[0192] This application also provides a program product, which includes executable instructions stored in a readable storage medium. When the computer program is executed by a computer, the technical solution shown in the above method embodiments is executed. The specific implementation method and technical effect are similar, and will not be repeated here.

[0193] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

[0194] For ease of explanation, the above description has been provided in conjunction with specific embodiments. However, the above exemplary discussion is not intended to be exhaustive or to limit the embodiments to the specific forms disclosed above. Various modifications and variations can be obtained based on the above teachings. The selection and description of the above embodiments are for the purpose of better explaining the principles and practical applications, thereby enabling those skilled in the art to better utilize the embodiments and various different variations of embodiments suitable for specific application considerations.

[0195] In this application, "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three cases: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document indicates that the preceding and following related objects have an "or" relationship.

[0196] "At least one of the following" or similar expressions refer to any combination of these items, including any combination of single or multiple items. For example, at least one of a, b, or c can mean: a, b, c, a and b, a and c, b and c, or a, b, and c, where each of a, b, and c can be an element itself or a set containing one or more elements.

[0197] In this application, "at least one" means one or more. "More than one" means two or more. The descriptions of "first," "second," etc., appearing in the embodiments of this application are only for illustration and to distinguish the described objects, and have no order, nor do they indicate a special limitation on the number of devices in the embodiments of this application, and cannot constitute any limitation on the embodiments of this application. For example, "first threshold" and "second threshold" are only used to distinguish different thresholds, and do not indicate that the size, priority, or importance of these two thresholds are different.

[0198] In this application, terms such as "exemplary," "in some embodiments," and "in other embodiments" are used to indicate that something is an example, illustration, or description. Any embodiment or design described as "exemplary" in this application should not be construed as being more preferred or advantageous than other embodiments or designs. Rather, the term "exemplary" is used to present the concept in a specific manner.

[0199] In this application, the terms "of," "corresponding (relevant)," "corresponding," and "related" may sometimes be used interchangeably. It should be noted that, unless a distinction is emphasized, their intended meanings are consistent. Similarly, in the embodiments of this application, "communication" and "transmission" may sometimes be used interchangeably. It should be noted that, unless a distinction is emphasized, their intended meanings are consistent. For example, transmission can include sending and / or receiving, and can be a noun or a verb.

[0200] In this application, "equal to" can be used with "less than" or "greater than", but not simultaneously with both. When "equal to" is used with "less than", it applies to the technical solution adopted by "less than". When "equal to" is used with "greater than", it applies to the technical solution adopted by "greater than".

Claims

1. A refrigerator, characterized in that, include: The cabinet is constructed with a freezer compartment and an ice-making compartment; A refrigeration system is installed inside the enclosure, and the refrigeration system includes: compressor; Condenser; Capillary; The compressor, the condenser, and the capillary tube are connected in sequence. An ice-making evaporator is used to provide cooling to the ice-making chamber; An ice-making fan is used to blow the cold air from the ice-making evaporator into the ice-making chamber; A refrigeration evaporator is used to provide cooling to the freezer compartment; A first defrosting device is used to defrost the freeze evaporator; A second defrosting device is used to defrost the ice-making evaporator; A switching element connects a capillary tube, an ice-making evaporator, and a freezing evaporator. When the switching element is in a first state, the capillary tube and the ice-making evaporator are connected, allowing refrigerant to flow sequentially through the compressor, the condenser, the capillary tube, the ice-making evaporator, and the freezing evaporator. When the switching element is in a second state, the capillary tube and the freezing evaporator are connected, allowing refrigerant to flow sequentially through the compressor, the condenser, the capillary tube, and the freezing evaporator. When the switching element is in a third state, the capillary tube is not connected to either the ice-making evaporator or the freezing evaporator. A controller, located within the enclosure, is configured to: When the refrigeration evaporator meets the defrosting conditions but the ice-making evaporator does not meet the defrosting conditions, the switching element is controlled to be in the third state so that no refrigerant flows through either the ice-making evaporator or the refrigeration evaporator, and the first defrosting device is controlled to defrost the refrigeration evaporator while the second defrosting device does not defrost the ice-making evaporator. During the defrosting process of the first defrosting device for the freezer evaporator, when the ice-making chamber is detected to require cooling, the ice-making fan is controlled to operate to blow the residual cold from the ice-making evaporator to the ice-making chamber, thereby providing cooling to the ice-making chamber.

2. The refrigerator according to claim 1, characterized in that, The controller is configured as follows: When the freezer compartment requires cooling and the ice-making compartment does not require cooling, the switching element is in the second state, so that refrigerant flows through the freezer evaporator and no refrigerant flows through the ice-making evaporator; When the defrosting conditions of the evaporator are met, the switching element is controlled to switch from the second state to the third state.

3. The refrigerator according to claim 1, characterized in that, The controller is configured as follows: When both the freezer compartment and the ice-making compartment require cooling, the switching element is in a first state, so that the refrigerant flows sequentially through the ice-making evaporator and the freezer evaporator; When the defrosting conditions of the evaporator are met, the switching element is controlled to switch from the first state to the third state.

4. The refrigerator according to any one of claims 1-3, characterized in that, The controller is also configured to: During the process of controlling the first defrosting device to defrost the refrigeration evaporator, the switching element is in the third state so that no refrigerant flows through either the ice-making evaporator or the refrigeration evaporator; When the ice-making evaporator is detected to meet the defrosting conditions, the second defrosting device is controlled to defrost the ice-making evaporator.

5. The refrigerator according to claim 4, characterized in that, The controller is also configured to: During the process of controlling the first defrosting device to defrost the refrigeration evaporator and the second defrosting device to defrost the ice-making evaporator, the switching element is in the third state so that no refrigerant flows through either the ice-making evaporator or the refrigeration evaporator; When the defrosting of the refrigeration evaporator is detected to be complete, the switching element is controlled to switch from the third state to the second state, so that refrigerant flows through the refrigeration evaporator and no refrigerant flows through the ice-making evaporator. The first defrosting device is controlled to stop defrosting the refrigeration evaporator, while the second defrosting device continues to defrost the ice-making evaporator.

6. The refrigerator according to claim 4, characterized in that, The controller is also configured to: During the process of controlling the first defrosting device to defrost the refrigeration evaporator and the second defrosting device to defrost the ice-making evaporator, the switching element is in the third state so that no refrigerant flows through either the ice-making evaporator or the refrigeration evaporator; When it is detected that both the freezing evaporator and the ice-making evaporator have completed defrosting, the switching element is controlled to switch from the third state to the first state, so that refrigerant flows through both the freezing evaporator and the ice-making evaporator, and the first defrosting device is controlled to stop defrosting the freezing evaporator, and the second defrosting device is controlled to stop defrosting the ice-making evaporator.

7. The refrigerator according to claim 5 or 6, characterized in that, The enclosure also includes a refrigeration compartment; The refrigeration system also includes: A compartmentalized evaporator, connected to the switching element, is used to provide cooling capacity to the refrigerator compartment; When the switching element is in the fourth state, the capillary tube and the compartment evaporator are connected, so that the refrigerant flows sequentially through the compressor, the condenser, the capillary tube, the compartment evaporator, the ice-making evaporator, and the freezing evaporator. The controller is also configured to: When the refrigerator compartment, the freezer compartment, and the ice-making compartment all require cooling, the switching element is controlled to be in the fourth state so that the refrigerant flows sequentially through the compartment evaporator, the ice-making evaporator, and the freezer evaporator.

8. The refrigerator according to claim 7, characterized in that, The controller is also configured to: When the ice-making evaporator is detected to meet the defrosting conditions, the switching element is controlled to switch from the fourth state to the second state, so that refrigerant flows through the freezing evaporator, and no refrigerant flows through the ice-making evaporator and the compartment evaporator, and the second defrosting device is controlled to defrost the ice-making evaporator.

9. The refrigerator according to claim 7, characterized in that, The controller is also configured to: When the defrosting conditions of the evaporator are met, the switching element is controlled to switch from the fourth state to the third state so that no refrigerant flows through the compartment evaporator, the ice-making evaporator and the evaporator, and the first defrosting device is controlled to defrost the evaporator. Alternatively, when it is detected that both the ice-making evaporator and the freezing evaporator meet the defrosting conditions, the switching element is controlled to switch from the fourth state to the third state, so that no refrigerant flows through the compartment evaporator, the ice-making evaporator, and the freezing evaporator, and the first defrosting device is controlled to defrost the freezing evaporator, and the second defrosting device is controlled to defrost the ice-making evaporator.

10. A defrosting control method, characterized in that, Applied to a refrigerator, the refrigerator comprising: The cabinet is constructed with a freezer compartment and an ice-making compartment; A refrigeration system is installed inside the enclosure, and the refrigeration system includes: compressor; Condenser; Capillary; The compressor, the condenser, and the capillary tube are connected in sequence. An ice-making evaporator is used to provide cooling to the ice-making chamber; An ice-making fan is used to blow the cold air from the ice-making evaporator into the ice-making chamber; A refrigeration evaporator is used to provide cooling to the freezer compartment; A first defrosting device is used to defrost the freeze evaporator; A second defrosting device is used to defrost the ice-making evaporator; A switching element connects a capillary tube, an ice-making evaporator, and a freezing evaporator. When the switching element is in a first state, the capillary tube and the ice-making evaporator are connected, allowing refrigerant to flow sequentially through the compressor, the condenser, the capillary tube, the ice-making evaporator, and the freezing evaporator. When the switching element is in a second state, the capillary tube and the freezing evaporator are connected, allowing refrigerant to flow sequentially through the compressor, the condenser, the capillary tube, and the freezing evaporator. When the switching element is in a third state, the capillary tube is not connected to either the ice-making evaporator or the freezing evaporator. The controller is located inside the enclosure; The method includes: When the refrigeration evaporator meets the defrosting conditions but the ice-making evaporator does not, the controller controls the switching element to the third state so that no refrigerant flows through either the ice-making evaporator or the refrigeration evaporator, and controls the first defrosting device to defrost the refrigeration evaporator while the second defrosting device does not defrost the ice-making evaporator. During the defrosting process of the first defrosting device for the freezer evaporator, when the ice-making chamber is detected to require cooling, the controller controls the ice-making fan to operate, so as to blow the residual cold of the ice-making evaporator to the ice-making chamber and provide cooling for the ice-making chamber.

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